Malicious PDF — malware analysis report

Static analysis result for SHA-256 940419232e9997f0…

MALICIOUS

PDF

83.7 KB Created: 2021-09-22 17:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2febacebf2c48a67d88a5e62734ea95f SHA-1: 35d3bdf82bff085bc3fbbc22cd537bc69e253a35 SHA-256: 940419232e9997f04014b51e23b05d7669b89ba90912a01d85f516cb531f3e71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The URL 'https://oniceh.ru/uplcv?utm_term=download+keygen+autocad+2016' suggests a lure related to software downloads, likely a phishing attempt to trick users into downloading malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed for user deception.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=download+keygen+autocad+2016 PDF link annotation
    • https://debcopharma.com/userfiles/file/kovukusizaluro.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gusugivuvamivura.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/kapesovosuvebababosamesis.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/bopisunokapawijidan.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ub96ba8e35ans9l7neip9cvm6i/salufoz.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/41469c10120f50c123953478a0707eae/33013142532.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/mokunijedosaxazijorupoxuj.pdfIn PDF document text
    • http://savemaxint.com/files/file/fipivigoxosegodi.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/73885363760.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/gabexokozoxegajuj.pdfIn PDF document text
    • http://ruihuitax.com/files/file/39316095794.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/gugarafiwujoj.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/bakulinuzerilogefinot.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345e9dd227a---rasezaturoborexiker.pdfIn PDF document text
    • http://tion.hu/upload/file/30340538274.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/24569179742.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/95254441419.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/6548581351.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/votoko.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/telinawegebavuzufupexeki.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/vavuvurodilufoju.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/renokuf.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/febilivoloxixofu.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c8a1c7a8b4a464c20498a7e5c0b8159a/26905565215.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 18728 bytes
SHA-256: a24d14cb80e24cd76095ebee5053aac3ab5439424aa727375bc5d45872425ae9
font_01_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 11040 bytes
SHA-256: ada4c9c638a49a4f4cc318dd5a804b91af624a31f5b681a4a35b3fb50cdd5e8b
font_02_sfnt_off00012959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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